CN208316612U - Frequency conversion control circuit, transducer air conditioning control circuit and transducer air conditioning - Google Patents
Frequency conversion control circuit, transducer air conditioning control circuit and transducer air conditioning Download PDFInfo
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- CN208316612U CN208316612U CN201820703568.3U CN201820703568U CN208316612U CN 208316612 U CN208316612 U CN 208316612U CN 201820703568 U CN201820703568 U CN 201820703568U CN 208316612 U CN208316612 U CN 208316612U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model provides a kind of frequency conversion control circuit, transducer air conditioning control circuit and transducer air conditioning, by the way that switch module is arranged in exchange input side, current detection module and zero crossing detection module, MCU detects zero cross signal by zero crossing detection module with this, and switch state switching is carried out according to zero cross signal control switch module, it is controlled with this and is charged to the filter module of DC side, its charging current is set to be no more than the first preset threshold, it is played with this and avoids impacting device in charge circuit, relatively existing needs, which are separately provided, simultaneously carries out the PTC resistor and relay of current limliting for charging to filter module, PTC resistor can be saved, the volume of entire frequency conversion control circuit is saved with this and is reduced costs.
Description
Technical field
The utility model relates to frequency control field more particularly to a kind of frequency conversion control circuits, transducer air conditioning control electricity
Road and transducer air conditioning.
Background technique
Frequency conversion at present can control circuit, such as be applied to the household electrical appliances such as frequency conversion domestic air conditioner of frequency conversion load, and load is to become
Frequency compressor, direct current generator etc., since bearing power is big, it is therefore desirable to the high-voltage electrolytic capacitor of large capacity is filtered power supply,
Since this capacitance is very as large as more than 800uF or more, electric current is very big when charging to it, in order to prevent charging current mistake
Greatly, generally in exchange one PTC resistance of input side series connection while a relay in parallel, in charging, relay is disconnected, and is passed through
PTC charges to electrolytic capacitor, and relay disconnects again after charging complete, needs to increase a powerful PTC resistor with this, occupies
The volume of entire control circuit.Further when applying on the frequency conversion control circuit of domestic air conditioner, indoor unit control
There is a main relay to control to outdoor for alternating current on circuit processed, and outdoor unit control circuit need to be separately provided one it is above-mentioned
Relay and PTC resistor, the volume of outdoor circuit board is occupied with this and increases cost.
Above content is only used for auxiliary and understands the technical solution of the utility model, does not represent and recognizes that above content is existing
Technology.
Utility model content
The main purpose of the utility model is to provide a kind of frequency conversion control circuits, it is intended to solve due to needing to be separately provided
It is therefore brought to the PTC resistor that electrolytic capacitor charges and occupies volume and increase cost problem.
To achieve the above object, a kind of frequency conversion control circuit provided by the utility model, the frequency conversion control circuit include
Switch module, current detection module, zero crossing detection module, MCU, rectification module, filter module and load；
The zero crossing detection module is connected on exchange input side, for detecting the zero cross signal of AC power source；
The rectification module input terminal connects AC power source, and the alternating current of input is converted into Rectified alternating current；And through institute
The direct current of filter module output smoothing is stated, with the loaded work piece power supply to connect with the filter module, the filter module
It is made of electrolytic capacitor, the electrolytic capacitor is several；
The switch module is connected on the exchange input side, and the MCU controls the switch according to the zero cross signal
The switch state of module switches to charge to filter module, and detects charging current by the current detection module, with
Make the charging current lower than the first preset threshold.
Preferably, the frequency conversion control circuit further includes PFC module；
The PFC module is connected between the rectification module and the filter module, the pulsation to rectification module output
Direct current carries out Active PFC.
Preferably, the current detection module is connected between the rectification module and the PFC module.
Preferably, the frequency conversion control circuit further includes PFC drive module；
The PFC drive module output end connects the PFC module, described in the PFC drive module input terminal connection
MCU, to drive the PFC module to work under MCU control.
To achieve the above object, the utility model also provides a kind of transducer air conditioning control circuit, the transducer air conditioning
Control circuit includes the frequency conversion control circuit.
Preferably, the transducer air conditioning control circuit further includes indoor electric current loop communication control circuit and outdoor electric current loop
Communication control circuit and outside MCU；
The switch module, current detection module, zero crossing detection module, MCU and indoor electric current loop communication control circuit
Pusher side, the rectification module, PFC module, filter module and load and the outside MCU are arranged described indoors for setting
Outdoor pusher side.
To achieve the above object, the utility model also provides a kind of transducer air conditioning, and the transducer air conditioning includes described
Transducer air conditioning control circuit.
The frequency conversion control circuit of the utility model, by exchange input side be arranged switch module, current detection module and
Zero crossing detection module, MCU with this by zero crossing detection module detect zero cross signal, and according to zero cross signal control switch module into
The switching of row switch state, is controlled with this and is charged to the filter module of DC side, so that its charging current is no more than first default
Threshold value is played with this and avoids impacting device in charge circuit, while relatively existing needs are separately provided for filtering
Module charging carries out the PTC resistor and relay of current limliting, can save PTC resistor, save entire frequency conversion control circuit with this
Volume and reduce costs.
Detailed description of the invention
Fig. 1 is the electrical block diagram of the utility model frequency conversion control circuit first embodiment；
Fig. 2 is zero passage detection waveform diagram in first embodiment；
Fig. 3 is the electrical block diagram of the utility model frequency conversion control circuit second embodiment；
Fig. 4 is the electrical block diagram of the utility model transducer air conditioning control circuit.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model
Limitation.
The utility model proposes a kind of frequency conversion control circuit, which can be applicable to the family for needing frequency control
On electrical appliance such as convertible frequency air-conditioner, frequency conversion refrigerator or washing machine domestic electric appliances controller, realize to frequency-changeable compressor, direct current generator etc.
Load is driven.As shown in Figure 1, the frequency conversion control circuit includes switch module 10, current detection module 20, zero passage detection mould
Block 50, MCU30, rectification module 60, filter module 80 and load A0；
Zero crossing detection module 50 is connected on exchange input side, for detecting the zero cross signal of AC power source；
60 input terminal of rectification module connects AC power source, and the alternating current of input is converted into Rectified alternating current；And through filtering
The direct current of 80 output smoothing of module, with the load A0 work power supply to be connect with filter module 80；
Current detection module 20 is connected on exchange input side or 60 outlet side of rectification module；
Switch module 10 is connected on exchange input side, and MCU30 is according to the switch state of zero cross signal control switch module 10
Switching detects charging current by current detection module 20 to charge to filter module 80, so that charging current is lower than
First preset threshold.
In Fig. 1, current detection module 20 can be connected on AC power source input side, specifically be connected on switch module 10
Between rectification module 60, to detect the alternating current passed through, current detection module 20 specifically can be by mutual based on electric current at this time
The circuit of sensor forms, and the alternating current that will test is converted into voltage signal and is output in MUC30.
Switch module 10 is mainly made of relay RY1 in Fig. 1, and is further connect with switch drive module 40, is opened
It closes drive module 40 to be mainly made of the first triode Q1, input terminal connects MCU30, exports low and high level letter by MCU30
Number, the switch state switching of 40 driving switch module 10 of control switch drive module.
Zero crossing detection module 50 is mainly by first resistor R4, second resistance R5, optocoupler IC1,3rd resistor R6, the 4th resistance
R7 and the second triode Q3 composition, alternating voltage is input to optocoupler IC1 by first resistor R4 and second resistance R5 partial pressure, at it
Outlet side exports zero cross signal, and through 3rd resistor R6, the 4th resistance R7 shaping, in the second triode Q3 collector outputting standard
Zero cross signal, zero cross signal waveform is as shown in Figure 2.
Rectification module is mainly made of rectifier bridge stack BR1, and the alternating current of input is converted into Rectified alternating current.
Filter module 80 is made of high-voltage electrolytic capacitor E1, E2 of large capacity, and single capacity is more than 400uF, will be rectified
The Rectified alternating current that module 60 exports is filtered, and the DC bus-bar voltage of output smoothing reaches 310V or so, with to connect below
The load A0 power supply connect.
Here load A0 is the load powered by above-mentioned DC bus-bar voltage, such as drive compressor IPM module and
The load such as compressor or direct current generator.
In the present embodiment, MCU30 according to the switch state of zero cross signal control switch module 10 by switching to filter
Wave module 80 charges, and limits charging current lower than the first preset threshold, makes it below the device that charging current flows through
Current value is born, such as in Fig. 1, charging current passes through the rectifier bridge of current detection module 20, common mode inductance L2, rectification module 60
Heap BR1 charges to electrolytic capacitor E1 and E2, the maximum dash current of the receiving of rectifier bridge stack BR1 in the device of above-mentioned process
For 100A, thus can choose the first preset threshold is 30A, i.e., it is reliable that control charging current, which is no more than 30A,.It is avoided with this
Big electric current leads to its overcurrent damage to rectifier bridge stack BR1 impact when charging to electrolytic capacitor E1 and E2.
Specifically, MCU30 according to the switch state of zero cross signal control switch module 10 by switching to filter module
80 when being charged, and can be when detecting zero cross signal, MCU30 control switch module 10 is open-minded, at this time to electrolytic capacitor
E1 and E2 charge, and when detecting that charging current is higher than the first preset threshold such as 30A, the shutdown of control switch module 10 is with disconnected
It opens and charges to electrolytic capacitor E1 and E2.As can be seen from Figure 2, for alternating voltage in zero passage, alternating current is also zero at this time, because
And when control switch module 10 is opened at this moment, pass through alternating current it is very small, thus to electrolytic capacitor E1 and E2 into
The initial current of its charging is very small when row charging, carries out charging process, charging electricity then as to electrolytic capacitor E1 and E2
Flow in exponential increase, control switch module 10 disconnection when increasing to above the first preset threshold, to prevent in charge circuit
Device impact cause these device failures.Switch module 10 is opened in zero crossing if not selection, such as selection is exchanging
Voltage peaks are open-minded, and at this time since voltage value is very high, thus while charging to electrolytic capacitor E1 and E2 may wink
Between reach very high charge current more than the first preset threshold, to cause MCU30 control switch module 10 to turn off, thus essence does not have
Play the role of charging to electrolytic capacitor E1 and E2.
Opening for above-mentioned switch module 10 needs to select near zero-crossing of alternating current constantly, preferably zero passage point moment.
When above-mentioned switch module 10 is relay as shown in figure 1, due to sending control signals to relay RY1's from MCU30
Contact be attracted there are delay times, therefore from detect zero cross signal to relay RY1 be attracted the moment be near zero-crossing point,
At such as 1-2ms in zero crossing；If switch module 10 is managed using other switching devices such as metal-oxide-semiconductors or IGBT, by
It is fast in these switching device switching speeds, it there's almost no switching delay, therefore switch module 10 can be opened into moment base
This control is in zero passage point moment.
Further, switched according to the switch state of zero cross signal control switch module 10 to filter module in MCU30
80 charge further include:
When detecting charging current lower than the second preset value, then judge to 80 charging complete of filter module, control switch mould
10 normal open of block, wherein the second preset value is less than the first preset value.
It is charged by above-mentioned opened every time in zero passage point moment MCU30 control switch module 10 to filter module 80,
Charging current is more than that the first preset threshold disconnects again, therefore control switch module 10 carries out discontinuous to filter to MCU30 by this method
Wave module 80 charges, and when electrolytic capacitor E1, E2 of filter module 80 are gradually filled with, voltage rises, therefore charging current meeting
It gradually decreases, if being lower than a second preset threshold smaller value such as 1A lower than the first preset threshold, can determine whether as charging
It completes, hereafter 10 normal open of MCU30 control switch module, hereafter filter module 80 is worked normally to be filtered and be carried out to load A0
Power supply.
The frequency conversion control circuit of the utility model, by exchange input side be arranged switch module, current detection module and
Zero crossing detection module, MCU with this by zero crossing detection module detect zero cross signal, and according to zero cross signal control switch module into
The switching of row switch state, is controlled with this and is charged to the filter module of DC side, so that its charging current is no more than first default
Threshold value is played with this and avoids impacting device in charge circuit, while relatively existing needs are separately provided for filtering
Module charging carries out the PTC resistor and relay of current limliting, can save PTC resistor, save entire frequency conversion control circuit with this
Volume and reduce costs.
Further, the utility model frequency conversion control circuit first embodiment, the utility model frequency conversion control circuit are based on
In second embodiment, frequency conversion control circuit further includes PFC module 70, and PFC module 70 is connected to rectification module 60 and filter module
Between 80, Active PFC is carried out to the Rectified alternating current of rectification module output.As shown in Figure 1, the PFC module 70 mainly by
Inductor L1, IGBT pipe Q2 and fast recovery diode D2 composition, and can further comprise PFC drive module 90, pass through MCU30
Control PFC drive module 90 switches over the switch state of IGBT pipe Q2, to realize Active PFC.
Further, above-mentioned current detection module 20 can also be connected on straight in addition to being connected in AC power source input side
Side is flowed, as shown in figure 3, can specifically be connected between rectification module 60 and PFC module 70.Current detection module 20 is inspection at this time
The DC current exported from rectification module 60 is surveyed, 80 charging current of filter module is detected with realizing, it can be based on simple electricity
Detection type circuit is hindered to realize.
The utility model also proposes a kind of transducer air conditioning control circuit, which includes above-mentioned
Frequency conversion control circuit, it is specific as shown in figure 4, including interior electric current loop communication control circuit C0 and outdoor electric current loop communication control
Circuit D0 and outside MCUB0 processed；
Switch module 10, current detection module 20, zero crossing detection module 50, MCU30 and indoor electric current loop Communication Control
Pusher side, rectification module 60, PFC module 70, filter module 80 and load A0 and outside MCUB0 are set indoors for circuit C0 setting
It sets in outdoor pusher side.
The transducer air conditioning control circuit increases the electric current loop of indoor and outdoors in the above-mentioned frequency conversion control circuit of application
The MCU of communicating circuit and outside, the control circuit of indoor unit and outdoor unit is communicated by electric current loop at this time, switch module
10 be that the master switch controlled in control circuit indoors outside power supply is arranged, simultaneous to play the filter controlled to outside
The on-off action that wave module 80 charges.
By the transducer air conditioning control circuit of the utility model, relatively existing transducer air conditioning control circuit is reduced
It is arranged in the control circuit of outside, is individually used for limiting filter module 80 relay switch and PTC of charging current
Resistance saves outside control circuit plate bulk with this, and reduces costs.
The utility model also proposes a kind of transducer air conditioning, including above-mentioned transducer air conditioning control circuit.
In the description of this specification, the description meaning of reference term " first embodiment ", " second embodiment ", " example " etc.
Refer to that specific method, device or feature described in conjunction with this embodiment or example are contained at least one implementation of the utility model
In example or example.In the present specification, schematic expression of the above terms are necessarily directed to identical embodiment or show
Example.Moreover, specific features, method, apparatus or the feature of description can be in any one or more of the embodiments or examples to close
Suitable mode combines.In addition, without conflicting with each other, those skilled in the art can will be described in this specification
The feature of different embodiments or examples and different embodiments or examples is combined.
The above is only the preferred embodiments of the utility model, and therefore it does not limit the scope of the patent of the utility model, all
Equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is applied directly or indirectly in
Other related technical areas are also included in the patent protection scope of the utility model.
Claims (8)
1. a kind of frequency conversion control circuit, which is characterized in that the frequency conversion control circuit include switch module, current detection module,
Zero crossing detection module, MCU, rectification module, filter module and load；
The zero crossing detection module is connected on exchange input side, for detecting the zero cross signal of AC power source；
The rectification module input terminal connects AC power source, and the alternating current of input is converted into Rectified alternating current；And through the filter
The direct current of wave module output smoothing, with the loaded work piece power supply to connect with the filter module, the filter module is by electricity
Capacitor composition is solved, the electrolytic capacitor is several；
The switch module is connected on the exchange input side, and the MCU controls the switch module according to the zero cross signal
Switch state switch to charge to filter module, and by the current detection module detection charging current so that institute
Charging current is stated lower than the first preset threshold.
2. frequency conversion control circuit as described in claim 1, which is characterized in that the frequency conversion control circuit further includes PFC module；
The PFC module is connected between the rectification module and the filter module, the pulsating direct current to rectification module output
Electricity carries out Active PFC.
3. frequency conversion control circuit as claimed in claim 2, which is characterized in that the current detection module is connected on the rectification
Between module and the PFC module.
4. frequency conversion control circuit as claimed in claim 3, which is characterized in that the frequency conversion control circuit further includes PFC driving
Module；
The PFC drive module output end connects the PFC module, and the PFC drive module input terminal connects the MCU, with
The PFC module is driven to work under MCU control.
5. frequency conversion control circuit as described in claim 1, which is characterized in that the frequency conversion control circuit further includes switch driving
Module；
The switch module drive module output end connects the switch module, the switch module drive module input terminal connection
The MCU.
6. a kind of transducer air conditioning control circuit, which is characterized in that the transducer air conditioning control circuit includes such as claim 1
To 5 described in any item frequency conversion control circuits.
7. transducer air conditioning control circuit as claimed in claim 6, which is characterized in that the transducer air conditioning control circuit is also
Including indoor electric current loop communication control circuit and outdoor electric current loop communication control circuit and outside MCU；
The switch module, current detection module, zero crossing detection module, MCU and indoor electric current loop communication control circuit setting
Pusher side indoors, the rectification module, PFC module, filter module and load and the outside MCU are arranged in outdoor unit
Side.
8. a kind of transducer air conditioning, which is characterized in that the transducer air conditioning includes the convertible frequency air-conditioner as described in weighing and require 6 or 7
Device control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820703568.3U CN208316612U (en) | 2018-05-12 | 2018-05-12 | Frequency conversion control circuit, transducer air conditioning control circuit and transducer air conditioning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820703568.3U CN208316612U (en) | 2018-05-12 | 2018-05-12 | Frequency conversion control circuit, transducer air conditioning control circuit and transducer air conditioning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208316612U true CN208316612U (en) | 2019-01-01 |
Family
ID=64712439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820703568.3U Active CN208316612U (en) | 2018-05-12 | 2018-05-12 | Frequency conversion control circuit, transducer air conditioning control circuit and transducer air conditioning |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208316612U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631690A (en) * | 2018-05-12 | 2018-10-09 | 广东希塔变频技术有限公司 | Frequency conversion control circuit, transducer air conditioning control circuit and transducer air conditioning |
| CN110030709A (en) * | 2019-04-29 | 2019-07-19 | 广东美的制冷设备有限公司 | Drive control circuit, air conditioner, control method and computer readable storage medium |
-
2018
- 2018-05-12 CN CN201820703568.3U patent/CN208316612U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631690A (en) * | 2018-05-12 | 2018-10-09 | 广东希塔变频技术有限公司 | Frequency conversion control circuit, transducer air conditioning control circuit and transducer air conditioning |
| CN110030709A (en) * | 2019-04-29 | 2019-07-19 | 广东美的制冷设备有限公司 | Drive control circuit, air conditioner, control method and computer readable storage medium |
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